Beijing Haihua Boyuan Science and Technology Development Co. Ltd

Beijing, China

We are offering test board for stepper motor driver ic. terminal instructionssignal interface for the signal-input controlclk+: the positive of the pulse signal input interfaceclk-: the negative of the pulse signal input interfacecww+: the positive of the motor' positive/reversal rotation control interfacecww-: the negative of the motor' positive/reversal rotation control interfaceena+: the positive of the motor' offline control interfaceena-: the negative of the motor' offline control interfacethe connection of the motor winding out1a: connect the a phase of the motor windingout2a: connect the a- phase of the motor windingout1b: connect the b phase of the motor windingout2b: connect the b- phase of the motor windingthe connection of the operation voltagevm: positive for the connection of the dc powergnd: negative for the connection of the dc powerinput signal interfaceinput signals are consistent with three lines: (1) stepping pulse signals of clk+ and clk-; (2) direction electric-level signal of cww+ and cww-; (3) offline signals of ena+ and ena-. They have the same interface circuits in the motor (see input signal interface schematic) and independent with each other. the feature of the input signal interface is that it can be connected with shared positive or shared negative according to users' need. Shared positive connection: connect the clk+, cww+ and ena+ separately to the power that controls the system. If the current level is just 5v, it can be connected directly. However, if the current is above 5v, there will a current limiting resistor needed outside the motor so as to supply a sustained drive current between 8 15ma for the optical coupling inside the motor. Add the input signals through clk- while the cww- and ena- is performing at the moment at a low electric level. Shared negative connection: connect the clk-, cww- and ena- separately to the ground interface of the control system (sgnd, isolated from the power ground), the +5v input signals will be added by clk+, while this moment cww+ and ena+ is performing at a high electric level. The interpretation of the current limiting resistor is as the same of the shared positive connection. The setting of the micro-stepping numberyou can use the dial-turntable switch on the motor to set the micro-stepping number, just follow the setting instructions on the subdivision table. Please as far as possible to use high subdivision under the load of the system's frequency. After that, you can calculate the stepping the stepping motor's step angle as follows: step angle=motors constant step angle/micro-stepping number. For example 1.8/40=0.045m3 m2 m1 subdivision on on on 2 on on off 8 on off on 16 on off off 32 off on on 64 off on off 128 off off on 10 off off off 5 the setting of the motors phase currentthe phase current is set by the motors potentiometers(vref), so as to make the motors output current is accordance with motors phase current. The limited max current for the motor is 4 a. The setting of the current attenuation methodaccording to the input voltage of fdt terminal, the fast-decay mode, slow-decay mode or mixed decay mode can be set up. Fdt voltage decay method above 3.5v slow decay 1.1v-3.1v or open mixed decay 0-0.8v fast decay